Hello RMDB,
Thank you for your message.
I am sorry but I quite didn’t get what you request. Is it a feature for events on the event sheet, or to make sub-groups (sub folders) of objects? - If the latter, that is possible with the new object panel.
Also, as explained on Welcome to the User Feedback channel! : try to be as clear as possible on why you are requesting the feature and what is your use context as this information helps when it comes to defining the scope and dependencies of requested features.
Thank you!